/usr/include/tesseract/fpoint.h is in libtesseract-dev 3.02.01-6.
This file is owned by root:root, with mode 0o644.
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** Filename: fpoint.h
** Purpose: Abstract data type for 2D points (floating point coords)
** Author: Dan Johnson
** History: Thu Apr 12 10:50:01 1990, DSJ, Created.
**
** (c) Copyright Hewlett-Packard Company, 1988.
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
** http://www.apache.org/licenses/LICENSE-2.0
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
******************************************************************************/
#ifndef FPOINT_H
#define FPOINT_H
/**----------------------------------------------------------------------------
Include Files and Type Defines
----------------------------------------------------------------------------**/
#include "host.h"
#include <stdio.h>
#include <math.h>
/* define data structure to hold 2D points or vectors using floating point */
typedef struct
{
FLOAT32 x, y;
} FPOINT;
typedef FPOINT FVECTOR;
/**----------------------------------------------------------------------------
Macros
----------------------------------------------------------------------------**/
/* macros for computing miscellaneous functions of 2 points */
#define XDelta(A,B) ( (B).x - (A).x )
#define YDelta(A,B) ( (B).y - (A).y )
#define SlopeFrom(A,B) ( YDelta(A,B) / XDelta(A,B) )
#define AngleFrom(A,B) ( atan2((double) YDelta(A,B), \
(double) XDelta(A,B) ) )
#define XIntersectionOf(A,B,X) ( SlopeFrom(A,B) * ((X) - A.x) + A.y)
/*-------------------------------------------------------------------------
Public Function Prototypes
---------------------------------------------------------------------------*/
FLOAT32 DistanceBetween(FPOINT A, FPOINT B);
FLOAT32 NormalizedAngleFrom(FPOINT *Point1, FPOINT *Point2, FLOAT32 FullScale);
#endif
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